There is provided a disk brake that can hold a required thrust force and maintain a stop state of a vehicle without increasing complexity in the disk brake even if the disk brake is operated in a high temperature state of a brake pad and then a temperature of the brake pad is reduced. In the disk brake (1), an electric motor (8) is driven to thrust a piston (6), the piston (6) presses the brake pad (5) against a disk rotor (2), and the piston (6) is held in the pressed position, the electric motor (8) is re-driven after a predetermined time from a start of holding of the piston (6), and a driving condition of the electric motor (8) after re-driving is determined based on a change in value of a current supplied to the electric motor (8) by the re-driving.